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Grogg thinks that \((x+y)^2 = x^2 + y^2\) for all real numbers x and y  but Lizzie disagrees! Let's get to the bottom of it.

a) Evaluate \((x + y)^2\) and \(x^2 + y^2\) when x=5 and y=12

b) When does \((x + y)^2\) equal \(x^2 + y^2?\) When does \((x + y)^2\)  not equal \(x^2 + y^2?\)

 May 1, 2020

Best Answer 

 #1
avatar+27001 
+2

Did you substitute in x = 5   y = 12    to find the results?

 

b.  only when x = 0    or    y= 0    or they BOTH = 0   are they equal

 May 1, 2020
 #1
avatar+27001 
+2
Best Answer

Did you substitute in x = 5   y = 12    to find the results?

 

b.  only when x = 0    or    y= 0    or they BOTH = 0   are they equal

ElectricPavlov May 1, 2020

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